Page 11 - Ranger SPM 2022 - Science

Science SPM Chapter 1 Safety Measures in the Laboratory

1.3 Fire Extinguishers

Types of Fire Extinguishers
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1. A fire extinguisher is an equipment used to control and extinguish fires.
2. Fire extinguishers can be classified into four types based on the medium used
in the fire extinguisher.

Water Foam
Form 4

Label colour: red Label colour: cream
• Extinguishes fires involving materials such • Extinguishes fires involving materials such as
as cloth, paper and wood wood, paper and flammable liquids or gases
• Cannot be used to extinguish fires involving such as oil, paint and natural gas
electrical appliances as water is a good • Works by covering the fire and lowering the
conductor of electricity temperature
• The contents can become frozen if stored in
a cool place

Carbon dioxide Dry powder

Label colour: black Label colour: blue
• Extinguishes fires involving electrical • Extinguishes all types of fires involving
appliances, gas and vapour. materials such as metal and non-metal solids,
• Carbon dioxide is a gas that does not liquids, gases and electrical appliances
conduct electricity
• Can extinguish fire in a hidden location

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F4 Chapter 1.indd 7 3/21/22 3:02 PM